56521047 has 8 divisors (see below), whose sum is σ = 82212480. Its totient is φ = 34255160.

The previous prime is 56521037. The next prime is 56521057. The reversal of 56521047 is 74012565.

It is an interprime number because it is at equal distance from previous prime (56521037) and next prime (56521057).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56521047 - 2¹² = 56516951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56521037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856347 + ... + 856412.

It is an arithmetic number, because the mean of its divisors is an integer number (10276560).

Almost surely, 2^56521047 is an apocalyptic number.

56521047 is a deficient number, since it is larger than the sum of its proper divisors (25691433).

56521047 is a wasteful number, since it uses less digits than its factorization.

56521047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712773.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 56521047 is about 7518.0480844432. The cubic root of 56521047 is about 383.7691551445.

It can be divided in two parts, 565 and 21047, that added together give a palindrome (21612).

The spelling of 56521047 in words is "fifty-six million, five hundred twenty-one thousand, forty-seven".